Dial for combination-locks.



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ROLLIN' C. LEWIS, OF STAMFORD, CONNECTICUT, ASSIGNOR TO THE YALE & TOWNEMANUFACTURING COMPANY, OF STAMFORD, CONNECTICUT,

DIAL FOR COMBINATION-LOCKS.

Specification of Letters Patent.

Patented Nov. 26, 1918.

To all whom it may concern:

Be it known that I, RoLLIN G. LEWIS, a citizen of the United States, anda resident of Stamford, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements in Dialsfor Combination-Locks; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to an improvement in dials for combination locks.

The object of the invention is to combine mechanical excellence witheconomy of construction, and it consists in the details of constructionas will be more fully explained and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view of a dial mounted inits ring; Fig. 2 is a view of the dial and its spindle removed from thering; Fig. 8 is a view in section through the dial and its spindle; Fig.f is a view of the dial core and its struck up cover before they areassembled, and Fig. 5 is a rear view of the dial.

In order that a dial may operate properly and concentrically within itssurrounding ring, it is necessary first, that the spindle be properlycentered, and second, that the dial itself should be accurately made sothat its periphery is a true circle, and it is also desirable forperfect operation, that the dial be sufficiently heavy so that whenrevolved it will have a certain amount of inertia.

Heretofore it has been the custom to make the dials of combination lockssolid, either out of cast bronze or brass, which is expensive, or tomake them out of stamped up bronze or brass of light gage, which isobjectionable, first, because the dial thus produced is too light, andsecond, that tools used in their construction bend and become impairedfrom constant use and lose their accuracy, so that the dials are notabsolutely circular and will consequently bind at points, with thesurrounding ring.

This invention resides primarily in combining the inexpensive core 6,with a struck up dial 7. The core 6 may be made of cast iron or othercheap metal, or it may be struck up or turned on a lathe, and conformsin shape and design to the finished dial. It is provided with anoutwardly projecting knob 8, and its periphery is milled or notched asat 9, so that when the covering 7- is secured thereon, the metal of thecover or struck up dial 7 will embed itself in the notches in theperiphery of the core and thus absolutely lock the cover against anymovement on the core. I

The core 6 and its knob S are bored and threaded to receive the spindle10, which latter isprefcrably threaded its entire length to provide forindefinite adjustment, and is also provided with a groove 11, to receivea spline 12 which, engaging the seat 13 in the hub 14 of the core, locksthe spindle against movement in the core. The hub 14: of the core iscylindrical and is preferably fitted with a bronze, brass or othernon-corrosive sleeve 17 so that it will rotate freely in the lock.

The struck up dial 7 is preferably of brass, bronze or other suitablemetal which will be ornamental in appearance and present a finish thatwill be lasting. The blank for the struck up dial 7 is shaped to fitover the knob and core, and then by spinning the edge of the blankaround the periphery of the core, and by rolling the base of the knobportion of the blank, into a corresponding depression 16 in the core,the struck up dial or covering 7 becomes permanently locked to the core.Instead of making the dial 7 of struck up metal, it may be made of acomposition such as rubber or other non-corrodible substance.

If desired the outer end of the knob may be counterbored and the coverprovided centrally with a hole as shown to receive the female threadedboss on the rear face of a disk 15, which latter may have a trade nameor other mark on its outer or exposed face. This disk overlaps the coverplate and holds it in place and against the outer face of the knob, andalso gives an ornamental finish to the dial.

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is

1. As a new article of manufacture, a dial for a combination lockconsisting of a metal core having a milled periphery and provided on itsfront face with a centrally located knob having a restricted neck, and acover of superior material forced against said restricted neck andshaped to conform. to the outer face and knob of the core, the outeredge of the cover being forced into the milled periphery of the core.

2. As a new article of manufacture, a dial for a combination lockconsisting of a metal core having the shape of the finished dial andprovided on its front face with a centrally located knob having arestricted neck and a rearwardly projecting hub, a spindle secured tothe core, and a cover shaped to receive the core and secured to theouter face of the latter by forcing it against the restricted neck ofthe knob, and a non-corrosive sleeve secured on the hub of the core.

3. The combination of a heavy metal core having a centrally locatedintegral knob, a threaded hole extending through the core and knob and arecess in the knob at the outer end of the hole, a cover shaped toconform to the front face of the core and knob and having a centralopening conforming to the recess in the knob, and a disk screwed to thefront end of the spindle and clamping the cover against the outer faceof the knob.

4. As a new article of manufacture, a dial for a combination lockconsisting of a solid metal core having a centrally located knob andotherwise conforming in shape to the finished dial, a cover of superiormetal shaped to fit the outer face of the core and the knob and providedwith dial notches adjacent its periphery and with a centrally locatedhole, and a disk secured within said hole and clamping the cover to theouter end of the knob.

In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

ROLLIN C. LEWIS. Witnesses:

SCHUYLER lVIERRITT, CHARLES E. VAIL.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

